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UNITED STATES {JAMES MOINTOSH; OF' NORRISTOWN, AND JOHN M. TAYLOR, OIBRIDGEI PORT PENN- SYLVANIA, ASSIGNO'RS '10 ,PATE

NTQOFFICE,

DIAMOND STATE FIBRE COMPANY, 01 BRIDGEPOBT,

\PENNSYLVANIA, A conrona'rron or DELAWARE.

' No Drawing.

5 Vania, and Bridgeport, Pennsylvania, re-

spectively, have invented a Mechanical Element and Method of MakingSame, of which the following is a specification.

One object of our invention is to provide a simple, practical andinexpensive process for making mechanical elements, such as pulleys,gear blanks, lever arms and the like, of high grade, and the inventionalso contemplates an easily operated and practical process either of twoways.

In accordance with onemodification of our invention, we utilizeaninexpensive kind of waste fibrous material such as cotton or linen orother fibres. These fibres are cut up so as to pass through a quarterinch sieve and are then intimately mixed with from forty to fiftypercent of apowdered phenolic condensation product in its intermediatesoluble, fusible state, such as that material known on the market ascondensite. We then place the mixture in a suitable mold and subject itto a pressure of, for example, two thousand or three thousand pounds tothe square inch and to a temperature of approximately three hundred andfifty degrees Fahrenheit. In the case of a gear or pulley one. inchthick and four inches in diameter, we continue this treatment for onehour though we may vary it according to the size and form of the memberto be made. It may be preferable to apply sheets of impregnated fibre orother suitable material in sheet form to the otherwise exposed sides' ofthe gear blank, pulley or other mechanical element before itsingredients are exposed to heat and pressure in order to improve itsappearance as well as increase its strength, I

In accordance with the second modification of our invention, we utilizewoven scrap material of fibrous nature already impregnated or thoroughlymixed with a phenohc condensation product in its interme: diete orfusible so uble form. This material, after having been to small piecesas above escribed, is subfor making such elements in object ma roperlyreduced MECHANICAL ELEMENT ANP METHQDOF MAKING SAME.

Application Med January 15, 1924. Serial No. 686,831.

jected to pressure and heat in accordance with the other form of ourinvention for a time which as before depends on the dimensions and formof the object under treatment. ,l/

Again, wemay impregnate such aterial as canvas, rags or other fibrouswoven vegetable substances and as above thereafter out these up intosmall. pieces so that they will pass through a quarter inch sieve.Thereafter. we proceed as above. described to make not on] mechanicalelements but other solid objects having the same properties.

In all ofthe above cases, the result of our method of operationdescribed is a ton h, structurally strong piece of 'solid material, itbeing understood that in all of the forms described, the'body orinterior portion of the be made of the comminuted, immaterial while theopposite exdescribed,-

pregnate ternal sides, may be made of one or any suitable numberof'layers o impregnated sheet-material.

and if desired other surfaces,

The finished object madeby our process has a high polish, isstructurally strong, waterproof, infusible and may or operated on bytools.

We claim: v p 1. A solid element comprising a mass of irregularlyassembled pieces of fabric impregnated with a phenolic condensationproduct in its final infusible form; with sheet material alsoimpregnated with the condensation product-and adherent to certainexternal surfaces of said solid object.

2. A solid element comprising a mass of be easily cut irregularlyassembled pieces of woven fabric impregnated with a phenoliccondensation product in its final infusible form; with sheet materialconstituting the exposed side portion of said solid mechanical element.

3. The method which consists in mounting between two bodies of sheetfabric a mass ofvirregularly placed ieces of fabric impregnated with aphone 10 condensation product in its intermediate form ;--and thereaftersubjecting said mass toheat and pres- 100 sure to form a mechanicalelement in which the. condensation product is in its final form.

s MoINTOSH. JOHN TAYLOR,

